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ADM203

更新时间： 2024-09-16 22:39:03
品牌 Logo 应用领域
亚德诺 - ADI 驱动器
页数 文件大小 规格书
6页 308K
描述
High Speed, +5 V, 0.1 uF CMOS RS-232 Driver/Receivers

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ADM203 数据手册

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High Speed, +5 V, 0.1 ␮F  
CMOS RS-232 Driver/Receivers  
a
ADM202/ADM203  
FUNCTIONAL BLOCK DIAGRAMS  
FEATURES  
120 kB Transmission Rate  
ADM202: Small (0.1 ␮F) Charge Pump Capacitors  
ADM203: No External Capacitors Required  
Single 5 V Power Supply  
Meets EIA-232-E and V.28 Specifications  
Two Drivers and Two Receivers  
On-Board DC-DC Converters  
؎9 V Output Swing with +5 V Supply  
Low Power BiCMOS: 2.0 mA ICC  
؎30 V Receiver Input Levels  
+5V INPUT  
0.1µF  
6.3V  
C1+  
C1–  
C2+  
1
3
V
16  
2
+5V TO +10V  
VOLTAGE  
DOUBLER  
CC  
0.1µF  
6.3V  
0.1µF  
6.3V  
V+  
4
5
+10V TO –10V  
VOLTAGE  
INVERTER  
V–  
0.1µF  
16V  
6
0.1µF  
16V  
C2–  
11  
10  
14  
7
T1  
T2  
T1  
T2  
R1  
T1  
IN  
OUT  
TTL/CMOS  
INPUTS  
RS-232  
OUTPUTS  
APPLICATIONS  
Computers  
Peripherals  
Modems  
Printers  
Instruments  
*
T2  
IN  
OUT  
12  
9
R1  
R1  
13  
8
OUT  
IN  
IN  
RS-232  
INPUTS**  
TTL/CMOS  
OUTPUTS  
R2  
R2  
R2  
OUT  
GND  
15  
ADM202  
+5V INPUT  
GENERAL DESCRIPTION  
7
The ADM202/ADM203 is a two-channel RS-232 line driver/  
receiver pair designed to operate from a single +5 V power sup-  
ply. A highly efficient on-chip charge pump design permits  
RS-232 levels to be developed using charge pump capacitors as  
small as 0.1 µF. The capacitors are internal to the package on  
the ADM203 so no external capacitors are required. These con-  
verters generate ±10 V RS-232 output levels.  
V
CC  
2
1
5
T1  
T1  
T2  
T1  
T2  
IN  
OUT  
TTL/CMOS  
RS-232  
OUTPUTS  
INPUTS  
*
18  
T2  
IN  
OUT  
R1  
R1  
R1  
4
3
OUT  
IN  
IN  
RS-232  
INPUTS**  
TTL/CMOS  
OUTPUTS  
R2  
20  
19  
R2  
R2  
OUT  
The ADM202/ADM203 meets or exceeds the EIA-232-E and  
V.28 specifications. Fast driver slew rates permit operation up to  
120 kB while high drive currents allows for extended cable  
lengths.  
DO NOT MAKE  
CONNECTIONS TO  
THESE PINS  
8
C1+  
11  
15  
10  
16  
C2+  
C2+  
C1–  
V–  
13  
12  
INTERNAL  
–10V POWER  
SUPPLY  
An epitaxial BiCMOS construction minimizes power consump-  
tion to 10 mW and also guards against latch-up. Overvoltage  
protection is provided allowing the receiver inputs to withstand  
continuous voltages in excess of ±30 V. In addition, all pins  
contain ESD protection to levels greater than 2 kV.  
C2–  
C2–  
ADM203  
V–  
17  
14  
INTERNAL  
+10V POWER  
SUPPLY  
V+  
GND  
6
GND  
9
The ADM202 is available in 16-lead DIP and both narrow and  
wide SOIC packages. The ADM203 is available in a 20-pin DIP  
package.  
*
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL/CMOS INPUT  
**INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT  
REV. 0  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, nor for any infringements of patents or other rights of third parties  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 617/329-4700  
Fax: 617/326-8703  
123456

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